These 'pop-up' micro-robots move to the beat of the light. Here’s a look at how they were made.
A new army of micro-robots just burst into the scene. One of the stand-out forms is a peekytoe crab-shaped figure that’s less than 1 millimeter across. The details on the geometrically varied group are described this week in the journalThe animal-like robots Rogers and his colleagues designed are distinguished by their very small size. The smallest ones are as wide as a human hair, and the larger ones are slightly smaller than a flea.
“There’s quite a bit of interest these days in tiny robots—small-scale structures that can be controlled remotely for various purposes. I think there’s a vision that they could be useful in surgical operations or for diagnostic purposes in the context of clinical medicine,” says John Rogers, a professor of materials science and engineering at Northwestern University, and an author on the paper.
“It’s remote-controlled in the sense that the pattern of illumination is determining the motion,” says Rogers. “It’s not remote controlled in the sense of an RC car being remote controlled because we don’t have an active radio built into the robot.” In theory, you could control many of these robots at once with something like a laser light show with scanning mirrors and other fancy light tech. All they require is a direct line of sight.
Although this fabrication will work with almost any layout, the reason for the bio-inspired design may be reflection of the history of work that has come from Rogers and his collaborators, including a
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